Mevotech Supreme Suspension Ball Joint P/N:MK9009
Give worn steering and suspension a solid, pivoting connection with the Mevotech Supreme Suspension Ball Joint MS40559. It installs as a direct-fit replacement for the 2015-2022 Ford Transit-150, Transit-250, Transit-350, and Transit-350 HD. Engineered in-house with application-specific upgrades, this ball joint is built for high-usage commercial vans, fleets, and working trucks.
This is an adjustable ball joint assembly. The listed Transit applications use two per vehicle (Quantity Per Application: 2), so order accordingly. If a worn ball joint is the cause of clunking, loose or wandering steering, or uneven tire wear, replacing it addresses that connection. Manufacturer part number MS40559. Country of origin: United States.
This part cross-references / interchanges with the following part numbers:
What vehicles does the MS40559 fit?
It's a direct-fit replacement for the 2015-2022 Ford Transit-150, Transit-250, Transit-350, and Transit-350 HD. Check the Buyer's Guide tab to confirm your vehicle.
How many do I need?
The listed Transit applications use two per vehicle (Quantity Per Application: 2), so order accordingly. Replacing them as a matched set helps keep steering and suspension balanced.
Is this ball joint greaseable?
Yes. It ships pre-greased and includes an SAE grease fitting, so it can be re-greased during routine service.
Does it come with mounting hardware?
Yes — it includes the mounting hardware, mount plate, castle nut, and cotter pin, and uses a bolt-in mounting with a threaded stud.
What are signs my ball joint may need replacing?
Common signs include clunking or knocking from the suspension, loose or wandering steering, and uneven tire wear. Diagnose the cause before replacing.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.